Here is a sample of my tap water chemistry: Temp 27-30 celcius PH 7.54 units Color 5.00 TCU Odor unobjectable Turbidity 1.10 NTU Alkalinity (CaC02) 53.00 mg/l Bicarbonates (HCO3) 64.70 mg/l Acidity (CaC03) 4.00 mg/l Free Carbon Dioxide (C02) 5.30 mg/l Chlorides (CI) 8.00 mg/l Iron (FE++) 0.06 mg/l Hardness (CaC03) 58.00 mg/l P.Alkalinity (CaC03) 0 mg/l Res. Chlorine 0.30 mg/l Flouride 0.41 mg/l Sulfates (S04) 12.00 mg/l Manganese 0.00 mg/l Conductivity 139.40 us/cm Nitrates (N02) 0.039 mg/l Nitrates (N03) 5.30 mg/l Ammonia-Nitrogen (NH3-N) 0.00 mg/l Do you think this is a good water quality for Apisto and Rams? Will you advise me to have an R.O. Unit with this quality of water? What is the best thing to do if I want to keep South American Dwarft Cichlids? Thanks for your advise. Edison ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@majordomo.pobox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@majordomo.pobox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!